Added corePlot library
More work on the graph view controller
Corrected database bug caused by my earlier commit
App is now stable and has the icon assets for the graph screen.

TODO: Implement the graphing
Graphing works!!!! Hooray!
Stats screen is now fully complete apart from scrolling of the trays
Added scrolling ability to the trays
Added comments and changed button size
Merge branch 'Stats-screen-Graph' into development

Conflicts:
	Social Solver/Social Solver/DataClasses/ChildUser.h
	Social Solver/Social Solver/DataClasses/GuardianUser.h